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The energy source you mean must be coal, but you seem to have two questions mixed together

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Q: What energy source produced more than 50What do you call all of the fossils that have ever existed in earths history percent of the us electricity in 2001?
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How are fossils used to helps understand the history of earth?

Scientists can use fossils to learn about what happened about what Earth was like in the past. A fossil is any evidence A fossil is any evidence that life once existed in a place.


If Earth's history was represented by one 24-hour day approximately how long has life proliferated on the planet?

Life has existed for most of the history of Earth. It is not known exactly for how long, but it seems to have existed for at least 3.7 billion years; you can compare this with the 4.568 billion years that the Solar System existed. It is possible that life existed longer, but left no traces (fossils).


How do you get to know that dinosaurs once existed?

I know about dinosaurs from reading about them, watching documentaries, and a visit to a natural history museum to see dinosaur fossils in person. Scientists learned about dinosaurs by studying fossils, including bones, skin impressions, and footprints, and the rocks the fossils were found in.


Why do we only have fossils of a fraction of the thing have existed on earth?

Because for much of the earth's early history, living things were made up of soft tissue only.


What is the history of electricity?

Electricity has existed long before our planet has. It is a natural occurrence in the universe. There have been some visionary geniuses that have taken our understanding and use of electricity to the next level such as Benjamin Franklin and Nikola Tesla.


Why do people want to know about fossils?

People want to know about fossils because fossils are history and tell us about history, and a lot of people find history fascinating.


Was there electricity in the Stone Age?

No, there was no electricity in the Stone Age. The use of electricity came much later in human history, with the development of technology in the late 19th century.


Why are fossils important to earths history as a planet?

Fossils aren't but the life that made them is.


Does the museum of natural history have fossils?

The museum of natural history contains many fossils of prehistoric animals and plants and would be an extremely fascinating place for you daughter to learn more about fossils.


Does paleontology have a history paleontology history and background information?

---- Informations: Paleonthology-is the study about fossils Paleontologists-are persons who study fossils ---- Other Questions??


Do fossils show a complete history?

No. Because there are not enough fossils to do any more than to guess.


How do you tell how old sediments are?

Sediments that have lithified, or become sedimentary rock, often contain marine and non-marine animal and plant fossils. These fossils are of organisms that existed only in certain time periods in Earth's history. Identifying the fossils reveals a general age of the rock, give or take some tens of millions of years. Actual age can be roughly estimated by means of radiometric dating.